Seated Quad-Hamstring Co-Contraction

0.0s / 9.9s

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Quads
10%
Hamstrings
10%
Trans. Abdominis
10%
Calves
8%

Trans. Abdominis 10% — deep, not shown on the figure

Sets

2

Reps

8 holds each side

Hold

10 sec

Rest

20 sec between holds

▶ Guided session · 2 × 8 holds each side

Co-contraction teaches the thigh to stiffen the knee on demand — the reflex a graft or new joint needs before it meets stairs.